I have a new HTC Rezound. Previously I had an HTC Incredible. I was told by the salesperson that the Rezound had the feature (like the Incredible) where the screen would go black while you were on the handset. My Rezound does not go black when I answer the phone. Is there a way to fix this to make the screen go black? Or is this possibly a phone issue? I don't want my face hitting any icons or buttons while I am in the middle of a call. This was one of my favorite features of the Incredible. If this isn't a feature of the Rezound, is there an app to fix it?